Flame-retardant railway signal cable

Abstract

The invention discloses a flame-retardant railway signal cable. Six tinned copper wires are twisted on the outer surface of the tinned copper wire at the center; an inner insulating layer is arranged on the outer surfaces of the twisted single wires; a coating layer coats the outer surfaces of 2-20 wire groups; a first copper layer coats the outer surface of the inner insulating layer; a steel layer coats the outer surface of the first copper layer; a second copper layer coats the outer surface of the steel layer; the second copper layer is tightly connected with the outer surface of the steel layer through a second alloy layer; an outer protective layer coats the outer surface of the second copper layer; and the first alloy layer comprises copper, iron, molybdenum, chromium and carbon. The flame-retardant railway signal cable is beneficial to absorption of a magnetic field in an electromagnetic field; and the extensibility and the electrical conductivity are also improved.

Description

technical field [0001] The invention relates to the field of railway traffic signal cables, in particular to a flame-retardant railway signal cable. Background technique [0002] With the rapid development of railway transportation, traffic safety has become a concern of the whole society. The speed of railway traffic is getting faster and faster, traffic management is becoming more and more centralized, and data signal transmission methods are diversified. In order to ensure the normal operation of the system, ensure traffic safety, reduce the occurrence and severity of traffic accidents, and reduce the loss of personnel and property, high-performance, high-strength signal cables are required to match it, and the existing railway cables The cable sheath is generally composed of the following structural layers: the coating layer covering the outer layer of the cable core, and the general coating layer is a coating layer made of extruded plastic sleeves or various strips. I...

AI Technical Summary

Problems solved by technology

The characteristics of the sheath of the above-mentioned cables are that the structure is relatively complicated, the outer diameter of the cable is large, the cable is heavy, the manufacturing process is complicated, the manufacturing cost is high, the construction cost is also high, and the bending performance of the cable is relatively poor.

Due to the limited strength of the shielding copper tape or aluminum tape, it is easy to break during the cable manufacturing and use process, resulting in the discontinuity of the shielding body, resulting in potential safety hazards in system operation